Download JXDH-6302 QAM Modulator User Manual
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JXDH-6302 QAM Modulator User Manual V1.5 Chengdu Jiexun Electronics Co.,Ltd INITEL TELECOMMUNICATIONS JXDH-6302 QAM Modulator User Manual v1.5 Chengdu Jiexun Electronics Co., Ltd Charter One Outline 1.1 Outline The manual describes the shell, assembly, functions, installation, and all the standard options which receivable of this QAM Modulator, including as follows: Summarize Installation Operation 1.2 Digital TV brief introduction Digital TV is defined as provide satellite TV transmission and digital TV programs services by means of digital transmitting, thereby provide users high quality images and features services in the integrated digital TV channels services. Digital TV system consists of three parts: digital TV head end systems transmit networks, user end system. As bellow chart1: Transmit network Digital Content Storage,directory, Sink decompression decode decrypt CA MPEG compression, encode, encryption, etc. Disposal warrant Searching content Broadcast outlet Return path (HFC PSTN ISDN Interact Edit software Operating system Output signal Digital TV is the necessary result of digital technology in the filed of development for TV. Digital TV is make analog signals to digital signals by sampling, quantify and encoding. Television system should include content, transmission and reception. The content is collection, make etc. Transmission is delivery the content to terminal 1/19 Http:// WWW.JIE-XUN.COM E-mail jx @j ie-xun.com JXDH-6302 QAM Modulator User Manual v1.5 Chengdu Jiexun Electronics Co., Ltd end via satellite, territory, cable network etc., thereby to composing a integrity digital TV system . The network for transmission digital system can be satellite, CATV, territory transmitting, and ADSL. In addition, The user end feedback the user ’s interactive information to the digital TV head end system via the return path, the return path can be composed of network as HFC route, W ireless Return Path, PSIN, ISDN. User end is what we called set top box(STB),User receive digital TV business information via STB, and shows them on the end equipments. Digital head end system can be divided to signal source processing, information processing and transmission processing three parts. For example various head programs, encoding equipments be part of signal source processing, program multiplex, scrambling etc. be part of information processing, QAM modulator, missed signals be part of transmission processing. It can be divided to user administer system, CA subsystem , DVB-C front end equipment subsystem, store and edit digital programs subsystem , digital broadcasting and middle subsystem etc., as following chart: Signal sources Transmission process Signal processing QAM Modulator Program Multiplex, Scrambling NVOD Satellite Programs SDH program down local program, Other program sources Program database Application software CA sys Local interact business Content admin Mixer EPG edit User admi sym Return signal Call center User request Broadcast control admin 2/19 Http:// WWW.JIE-XUN.COM E-mail jx @j ie-xun.com JXDH-6302 QAM Modulator User Manual v1.5 Chengdu Jiexun Electronics Co., Ltd Terminology CA: Condition Access; DVB-C: Digital Video Broadcasting-Cable; MMDS: Multichannel Microwave Distribution System; DSL: Digital Subscriber Line; HFC: High-Frequency Current; PSTN: Public Switched Telephone Network; ISDN: Integrated Services Digital Network; DVS: Digital Video System; DTX: Digital TV Exchange platform; QAM: Quadratur e Amplitude Modulation; STB: Set Top Box; EPG: Electronic Program Guide; MPEG: Moving Picture Express Group; DVB: Digital Video Broadcasting; PSI: Program Specific Information; SI: Service Information; ASI: Asynchronous Serial Int erf ace. 3/19 Http:// WWW.JIE-XUN.COM E-mail jx @j ie-xun.com JXDH-6302 QAM Modulator User Manual v1.5 Chengdu Jiexun Electronics Co., Ltd Charter 2 Product Summarize 2.1 Summarize In the broadcasting process of digital TV programs, QAM modulator mainly complete QAM modulate and up-frequency conversation process for TS stream, Apply to multi-level transmission, broadcasting of digital TV business. QAM modulator mainly used in head end of digital TV broadcasting, it is composed by t wo modules QAM modulator and digital up-frequency conversation, modulate the input serial or parallel TS str eam via the QAM modulator module, modulate to IF frequency, then pass the up-frequency conversation module to frequency transform, into standard channel or supplem ent channel which meet demand. Finally mixed enter into CATV network, and received by the terminal STB. 2.2 System components and working principle 2.2.1 System components QAM Modulator components as below: SPI ASI DS3 E3 DP QAM Process IF output 35.25/36/36.15/44M H RF output RF 48 860MHz modulate IF process CPU Network Control Interface LED Keyboard LCD Chart 2-1 QAM digital modulator components 4/19 Http:// WWW.JIE-XUN.COM E-mail jx @j ie-xun.com JXDH-6302 QAM Modulator User Manual v1.5 Chengdu Jiexun Electronics Co., Ltd QAM modulator mainly composed by following modules: Data processing cell transform the input signals from all sorts of interfaces to standard signals and make necessary data processing, make the pretreatment of QAM modulate. QAM modulate cell modulates the data stream to spectrum signal, IF modulates output as 35.000-44.00MHz (stepping as 125KHz) adjustable. RF modulate cell transform the IF to 110-862 MHz to TV channels. CPU/LCD/LED/keyboard units complete keyboard input, LED display and smart control etc. 2.2.2 Principle JXDH-6302 QAM Modulator comply with DVB-C standard(GY/T 170-2001 INMOD-6302 GY/T 106-1999),Digital signal will multi-process together with other data stream via MPEG-II compress and encode, the send to QAM modulator, QAM encode is according to DVB technical criterion, such as interweave, RS error correcting encode etc.. After processed by IF then up-frequency conversation to TV channels , so that to broadcast in HFC, microwave MMDS network, can be applied in digital TV, digital broadcasting, video-on-demand, internet, video conference and so on digital broadband application system. 2.3 Features Support IYU-T.83A Error correct encode completely meet DVB-C standard Be workable under QPSK, 16QAM, 32QAM, 64QAM, 128QAM, 256QAM mode Input interface: ASI and SPI (DS3/E3 optional) Input date bit rate range: 1.5 51.6Mbps Output data bit rate range: 2 56Mbps Output signal Bandwidth(BW) range: 1.15 8.05MHz(roll down coefficient is 0.15) Output data symbol rate range: 1 7Mbaud/s 5/19 Http:// WWW.JIE-XUN.COM E-mail jx @j ie-xun.com JXDH-6302 QAM Modulator User Manual v1.5 Chengdu Jiexun Electronics Co., Ltd RF frequency range: 110 862MHz Output level range: 95dBuV 115dBuV (stepping -0.5dB/step adjustable ) 188/204 packet length adaptable itself Adopt big enough cache design, ASI interface support paroxysmal and symmetrical input TS stream, and can equilibrate and reforming the TS stream, enhance the efficiency of output TS stream. Input data empty packet filtering and output data fill in. PRC proofread function, can accurately correct several PCR of input data separately. Real time inspect and display for the efficient TS stream. Adaptable itself to filtering circuit design to ensure the excellent suppress capability out of band. -20dB RF test mouth to monitor IF output. Fault alarm display LCD screen display Network control interface, make centralize management, remote upgrade and maintenance (network management software only for option) Power-off memory 2.4 Data Interface 2.4.1 ASI interface (Asynchronous Serial Interface) A. Input Socket: BNC Impedance: 75 Packet format: 188 or 204 byte(no route encode) Route data speed velocity: 270Mbps Max efficient data: 51.6Mbps Standard: meet DVB standard, support paroxysmal and symmetrical input TS stream. B. Ring route output 6/19 Http:// WWW.JIE-XUN.COM E-mail jx @j ie-xun.com JXDH-6302 QAM Modulator User Manual v1.5 Chengdu Jiexun Electronics Co., Ltd Socket: BNC Impedance: 75 2.4.2 SPI Input Interface (Synchronous Parallel Interface) Socket: DB-25 female Packet format: 188 or 204 byte(no route encode) Standard: compatible of DVB, LVDS working methods. 2.5 IF Interface A. IF output Linker: BNC socket Impedance: 75 Center frequency: 35.000 44.000MHz adjustable (stepping 125KHz) IF bandwidth: 8MHz Return loss: 18dB Input level: 100dBuV 2.6 RF Interface A. RF output Connector: F jack (the metric system) Impedance: 75 Output frequency: 110MHz 862MHz (provide per model) Return loss: 12dB Output level: Max 115dBuV(adjustable, stepping at 0.5dB) Level adjustable range: 0 20dB Carrier suppression: >55dB Modulate error rate(MER): 32dB(closing balance), 45dB(opening balance) Bit modulate error rate(BER): 1*10-8 SNR(Outside band): 50dB 7/19 Http:// WWW.JIE-XUN.COM E-mail jx @j ie-xun.com JXDH-6302 QAM Modulator User Manual v1.5 Chengdu Jiexun Electronics Co., Ltd B. RF test output Connector: BNC Impedance: 75 Output level: 75dBuV 95dBuV (adjustable) 2.7 Signal channel coding Modulate mode: 16QAM 32QAM 64QAM 128QAM 256QAM Channel coding: comply with DVB standard RS coding IF modulate error rate(MER): 44dB SNR(outside band): 50dB 2.8 Network administration interface Ethernet interface: Ethernet IEEE802.3, RJ45interface Software agreement the SNMP agreement 2.9 power supply Voltage: 100-240VAC Frequency: 50Hz 2% Electric Power: 20W 2.10 Working environment Surrounding temperature: Storage temperature: 25 C 5C 45 C +55 C Relative humidity: 10 75% 2.11 Radiate and safety requirements Comply with GB13837-92 and GB8898-88 standard. 8/19 Http:// WWW.JIE-XUN.COM E-mail jx @j ie-xun.com JXDH-6302 QAM Modulator User Manual v1.5 Chengdu Jiexun Electronics Co., Ltd 2.12 Dimension 44.5mm height 1U ×483mm(width,19 ) ×300mm(deep) 2.13 Weight 3.5 kg 2.14 Figure and description Front panel sketch: JXDH-6302 QAM Modulator INMOD-6302 Power Enter Menu Digital Video Broadcasting Alarm 1 2 3 4 1. LCD screen display 2. Power supply indicator 3. Fault alarm indicator 4. UP/DOW N/LEFT/RIGHT button 5. Confirm Button 6. Menu/Cancel button 5 6 Rear panel sketch: Ethernet ASI IF OUT OUT RF OUT TEST AC110V-220V-50/60Hz IN 2.14.1 SPI input interface: 9/19 Http:// WWW.JIE-XUN.COM E-mail jx @j ie-xun.com JXDH-6302 QAM Modulator User Manual v1.5 No. Signal name Chengdu Jiexun Electronics Co., Ltd description No. Signal name description 1 CLK-A Signal clock 14 CLK-B Signal clock 2 GND grounding 15 GND Grounding 3 D7-A Data 7th 16 D7-B Data 7th 4 D6-A 6th 17 D6-B 6th 5 D5-A 5th 18 D5-B 5th 6 D4-A 4th 19 D4-B 4th 7 D3-A 3rd 20 D3-B 3rd 8 D2-A 2nd 21 D2-B 2nd 9 D1-A 1st 22 D1-B 1st 10 D0-A 0 23 D0-B 0 11 DVALID-A Data valid 24 DVALID-B Data valid 12 PSYNC-A 25 PSYNC-B Packet synchro 13 Cable Packet synchro Cable shielding line 10/19 Http:// WWW.JIE-XUN.COM E-mail jx @j ie-xun.com JXDH-6302 QAM Modulator User Manual v1.5 Chengdu Jiexun Electronics Co., Ltd Charter 3 Operation QAM m odulator front panel is for user operate, before normal operation you can keep the default setting witch is the factory setting, and you can setting for input, output parameter, operation. Input setting including selecting input interface, setting output parameter. 3.1 Setting operation 3.1.1 Boot interface After boot it, the LCD displays as below: JX-QAM RF: 470.000MHz IN SR: 6875K/S 64QAM Here pressing RIGHT button, the screen displays as below : Avai Rate: 00.000Mbps In Rate: 00.000Mbps It is for inspect the input code rate timely, press “Menu” for quit. 3.1.2 Main menu setting: Click on “Menu” enter m ain menu, select the item by the DOW N button, press “Enter”, the sketch as below: Set Input port Select Language QAM Mode Factory Setting Set Symbol Rate Set IF View serial number About QAM System Set RF Frequency RF Level ATT Set IP address Set Subnet mask 11/19 Http:// WWW.JIE-XUN.COM E-mail jx @j ie-xun.com JXDH-6302 QAM Modulator User Manual v1.5 Chengdu Jiexun Electronics Co., Ltd 3.1.3 Input interface setting: Moving the cursor to input interface setting, press “Enter”, select the items by LEFT,RIGHT button, it displays as below, press “Enter” after confirm selection for save . Set Input Port * ASI SPI 3.1.4 QAM mode setting Press “Enter” to QAM mode setting, , select the item which you need by pressing UP DOW N button, it display as below, press “Enter” after confirm selection for save. QAM Mode 64 64QAM 3.1.5 Symbol rate setting: Press “Enter” to Symbol Rate Setting, press the up dow n button will change the number while move cursor by pressing left right button to select the item which need to be reset, it display as below, after setting press ”Enter” for save. Set SR [38.014Mbps] (6875) 6875 K/S 3.1.6 IF Frequency: Press “Enter” to IF Frequency , press the up down button will change the number while move cursor by pressing left right button to select the item which need to be reset, the frequency range 35.000 44.000MHz adjustable, it display as below, after setting press “Enter” for save. Set IF 36000 36000KHz 12/19 Http:// WWW.JIE-XUN.COM E-mail jx @j ie-xun.com JXDH-6302 QAM Modulator User Manual v1.5 Chengdu Jiexun Electronics Co., Ltd 3.1.7 RF Output Frequency Setting Press “Enter” to RF Output Frequency Setting, press up down button will change the num ber while move cursor by pressing left right button to select the item which need to be reset, the frequency range: 110MHz 862MHz, it display as below, after reset press “Enter” for save. Set RF Frequency 470000 470000KHz 3.1.8 RF Output level Press “Enter” to RF Output Level, press up down button to change the number, the adjustable range is 0 ~ 20dB, stepping at 0 ~ 20dB, it displays as below, press “Enter” after reset for save. RF Level ATT -00.0 -00.0dB 3.1.9 IP Address Setting Press “Enter” to IP Address Setting, change the number by press up down button, move cursor by pressing left right button to select the item to be reset, it display as bellows, press “Enter” after reset for sav e. (Note: the beginning 9 digits of QAM IP address and of the server are the same, the ending 3 digits are different.) Set IP Address 192.168.100.001 3.1.10 Subnet Mask Press “Enter” to Subnet Mask, change the number by press up down button, move cursor by press the left right button to select the item to be reset, it display as 13/19 Http:// WWW.JIE-XUN.COM E-mail jx @j ie-xun.com JXDH-6302 QAM Modulator User Manual v1.5 Chengdu Jiexun Electronics Co., Ltd bellows, press “Enter” after reset for save. (Note: the subnet m ask of QAM and server are the same.) Set Subnet mask 255.255.255.000 3.1.11 Language Press “Enter” to Language, m ove cursor by pressing left right button to choose the needed language, it display as below, press “Enter” after reset for save. Select Language * English 3.1.12 Restore Factory Setting Press “Enter” to Restore Factory Setting, move cursor by press left right button to choose confirm / cancel, it display as below, press “Enter” after select for save. Resume to default: * Confirm Exit 3.1.13 Product No. and About QAM Modulator Press “Enter” to Product Serial No., it displays its serial number from the factory. Press ”Enter” to About QAM Modulator, it displays the product’s type and company’s w ebsite . View Serial Number. About QAM System 14/19 Http:// WWW.JIE-XUN.COM E-mail jx @j ie-xun.com JXDH-6302 QAM Modulator User Manual v1.5 Chengdu Jiexun Electronics Co., Ltd Charter 4 Installation Guide 4.1 Inspection upon Reception Open the package inspect the article, inspect the package for small parts without fail, check the articles according to the packing list or below items:, QAM Modulator User Manual Q9 connector 1 AC power source wire In case of the actual articles doesn’t accord with above list, please advise us immediately. 4.2 Installation preparation When install this device, please follow steps as below. Each of the install details will be described in rest of this charter, refer to the rear panel for the specific position. This charter contain below contents: Check if there any device lost or damaged during the transportation. Get ready the surrounding condition for the installation. Install QAM Modulator. Connect the signal wires. 4.2.1 Installation process as below chart: Acquisition Check Fixing Device Connecting Grouding Wire and Power Cord Connecting Signal Wire Setting Parameter Running Device 15/19 Http:// WWW.JIE-XUN.COM E-mail jx @j ie-xun.com JXDH-6302 QAM Modulator User Manual v1.5 Chengdu Jiexun Electronics Co., Ltd 4.2.2 Surrounding condition requirement: Item Machine room space Requirements W hen install many machines array in one room, the distance between 2 row should be 1.2~1.5m and the distance to wall should be no less than 0.8m. Non conductive, dust proof, Machine room Floor Volum e resistivity of ground anti-static m ateri al : 1 107~1 1010 Grounding limiting resistance : 1M Floor beari ng should be greater than: 450Kg/m 2 Surrounding tem perature indoor Relative tem perature Atmospheric pressure Door and windows Wall indoor Fire protecti on Under 5~40 C operate f or long tim e, under 0~45 C operate for short tim e 5~40 C, i nstalling air-conditioning is recomm ended. Under 20%~80% operate for long tim e under10%~90% operate for short tim e. 86~105KPa. Must be sealed by dustproof rubber strip, with double-deck glass window is recomm ended, and strictly sealed. Can be covered with wallpaper, or bri ghtness less paint, rather than easy pulverization dope. Machine room should matched Fire alarm system and exti nguisher . Requiring device power, air-conditioning power and lighting power Power supply three independent supply systems. Device power requires AC power 110V 60Hz, Please check carefully devices running. 4.2.3Grounding Requiroment All function modules’ good grounding designs are the base of reliability and stability of device working. Also, they are the most important guarantee of lightning arresting and interference rejection. Therefore, system must follow above rule. Coaxial cable’s outer conductor and both ends of shield layer should keep soundly electric conducting with the metal shell of the device. Grounding conductor must adopt copper conductor in order to reduce high frequency impedance, and the grounding wire must be as thick and short as possible. The 2 ends connection points of grounding wire must make sure for well electric conducting, disposal of anti- corrosion. It is prohibited use other devices as part of grounding wire’s electric circuit 16/19 Http:// WWW.JIE-XUN.COM E-mail jx @j ie-xun.com JXDH-6302 QAM Modulator User Manual v1.5 Chengdu Jiexun Electronics Co., Ltd The junction cross-section of grounding wire which connect machine cabinet to lighting protection unit should no less than 25mm 2. 4.2.4 Cabinet Grounding In the same machine room, each cabinets grounding ends should connect to the appointed copper strips separately. The grounding wire should be as shorter as possible to avoid being coiled, cut it to short if the wire is too long when installing. The wire’s cross-section where grounding end connecting to strips should be no less than 25mm2. 4.2.5 Device Grounding When make device grounding, Connect the dependency connection pole to the chief cabinet dependency connection strips by wire. 4.3 Wires Connection The power supply jack placed at the right side of the rear panel, at its left is power switch. At the right lower side it is grounding connect bolt. Connect power wire One end of the power supply wire inserts the AC power jack, while the other end connects with the QAM Modulator. Connect grounding wire W hen connect separately to the room’s dependency, adopt the m ode of independent grounding, that is grounding together with other devices(such as transmit devices), when united grounding the grounding impedance should less than 1 Caution: Before connect to the power source wire, make sure the switch of QAM Modulator should be “OFF”, and together with the power supply system be grounding. 17/19 Http:// WWW.JIE-XUN.COM E-mail jx @j ie-xun.com JXDH-6302 QAM Modulator User Manual v1.5 Chengdu Jiexun Electronics Co., Ltd 4.4 Signal wire Connection 4.4.1 RF Output Cable QAM Modulator adopt BNC connector, connecting by 75 coaxial-cable as picture. The joint is BNC connector, the device end is cathode ,the cable be anode. 4.4.2 Connect ASI Output W hen set up QAM Modulator ASI input, the ASI input interface (ASI IN) should be connect with other MPEG-2/DVB devices which also have ASI output interface by 75 coaxial-cable, that is to say when connect, 1 device’s ASI output connect to another one’s ASI input interface. ASI input interface adopt BNC connector as below picture: 18/19 Http:// WWW.JIE-XUN.COM E-mail jx @j ie-xun.com